Closure device for tubes



Oct. 24,1939. RUETZ 2,177,335

CLOSURE DEVICE FOR TUBES- Filed Aug. 20, 1938 INVENTOR THEoDoR RUETZATTYS Patented oct. 24, 1939 I f UNITED STATES PATENT OFFICE I I vonosmn t v i je ion TUBES Application August 20, 1938, Serial No.226,003

r I In Switzerland July 1, 1938 6 Claims. (Cl. 221-60) (The presentinvention relates to C o tubular member 6 and to form a seal between itvices for tubes and has for its object to prov and the neck I. At itslower end the tubular a improved sa y closure vice which al o member 6is provided with an inlet aperture :2, enables the contents O t e tubeto be eXpelled while a slot 9 constituting the outlet aperture is fromthe tube W hout so the e of the provided in the wall of the tubularmember 6 im- 51 tube. U I mediately adjacent the oblique end face 4' ofthe The safety closure device'accorcling to the inpin 4, ventioncomprises a tubular member slidable in Bef re the tub i fill d nd losedth tubuthe neck of the tube, a closure member secured to lar member 6 isinserted through the neck I' of thet outer end of the tubular' e atlea-St the tube from the inside and is fastened on the 10. Oneinletbpening inthe u r membe at e pin 4 of the closure member 3. Toprevent the end opposite to that at which the closure member tubularmember 6 from being 'withdrawn comis s u a an utl t op in in the wall ofpletely from the tube it is provided at its inner e tubu a member a aPoint intermediate t end with a spherical enlargement I with at leastinlet opening and the'closure member. one inlet aperture 8 through whichthe contents 15 The tubular member may conveniently be seof the tube 1pass into the tubular member 6. cured to the closure member bypositioning it on The provision of the slot-shaped outlet aperture anward dir t d p p v d on the latter. 9 in the tubular member 6immediately in front The p preferably terminates in an qu of the obliquesurface 4 on the pin 4 ensures that fa im y j n the outlet p ning to inthe discharge of the contents of the tube there 20 facilitate theexpulsion of the co e o he is no dead angle in which some of thecontents tube through the outlet opening. can be trapped and perhapsdecompose and there- The length of the tubular member and the by affectdetrimentally the keeping properties of position of the outlet openingtherein are so dethe contents as a whole.

termined that when the tubular member has been Also by the arrangementof the delivery point 25 pushed back into the tube the latter iscompletely in th tubular member as described and illusclosed even whenthe closure member has not trated any entry of air into the tube duringor been Se u b t merely pushed in against the consequent to the removalof the contents is neck of the tube. avoided, even though the tube isnot completely To prevent the closure member with the tubular closed butthe closure member is merely pushed 30 member from emerging entirelyfrom the tube, down against the neck of the tube.

' that end of the tubular member which is dis- Further advantages of thesafety tube closure posed within the tube is provided with a stop pref-V as described and illustrated are as follows: erably in the form of aspherical enlargement (a) The closure member 3 when opened rewhich alsoaccommodates the inlet aperture. mains connected with the tube I bymeans of the 35 In the accompanying drawing, one emboditubular member 6so that it cannot be lost, ment of the invention is shown by way ofexample (I?) Whether the closure member 3 is in the in the case of atube with a threaded closure fully closed position or is merely pushedin as far member, as is permitted by the neck I, the outlet slot 9 is 40Fig. 1 shows a section through the tube with displaced into the interiorof the tube so that 40 the closure in the open position, 1 v drying ofthe material at the outlet slot is avoided, Fig. 2 shows a sectionsubstantially along the (c) When the closure member 3 is fully closedline II of Fig. 1 with the closure in the closed there is a double sealwith respect to the interior position. of the tube. l is the normal tubewith the usual threaded I claim: 45 neck I which, however, is providedwith an inter- 1. A tube closure device comprising a tubular nal groveto receive a packing 2. The closure member sliding in the neck of thetube, a closure member 3 is in the form of the customary screw membersecured to the outer end of the tubular cap and has a pin 4 which isdirected towards member, the inner end of the tubular member the neck lof the tube and is provided with an being closed, said tubular memberhaving an in- 50 oblique end face 4'. The closure member 3 is letopening formed in the side wall thereof adprovided with a packing 5 toform a seal with jacent the inner end and an outlet opening in the theend of the threaded neck. Secured on the tubular member intermediate theinlet opening pin 4 is a tubular member 6 which is slidable in and theclosure member.

the neck I. The packing 2 serves to guide the 2- A tube closure devicecomprising a tubular 55 member secured to the outer end of the tubularmember, a spherical enlargement at the inner end of the tubular member,closing said inner end thereof, an inlet opening in the side of 'saidenlargement, and an outlet opening in said tubular member intermediatethe inlet opening and the closure member.

4. A tube closure device comprising a tubular member sliding in the neckof the tube, means limiting the extent to which the tubular member canbe drawn out of the tube, a closure cap secured to the outer end of thetubular member, a spherical enlargement closing the inner end of thetubular member and provided with a lateral inlet opening in the sidewall thereof, and an outlet opening in the tubular member at a pointwhich lies within the tube when the tubular member is pushed into thetube until the cap encounters the neck, but which lies outside the tubewhen the tubular member is drawn out of the tube to its maximum extent.

5- A tube closure device comprising a screw cap adapted to be broughtinto threaded engagement with the neck of the tube, a pin integral withthe cap and projecting therefrom so as to pass into the neck of the tubewhen the screw cap is in threaded engagement with the neck, an inclinedface formed at the end of said pin, a tubular member mounted on the pinand projecting beyond the end thereof and slidable in the neck of thetube, a packing accommodated in an internal groove in the neck andforming a seal between the tubular member and the neck, an opening inthe tubular member immediately adjacent the inclined face at the end ofthe pin, a spherical enlargement at the end of the tubular member withinthe tube, and at least one opening in the spherical enlargement, theWhole being arranged so that when the cap is unscrewedand the tubularmember withdrawn to the full extent determined by the sphericalenlargement, the aperture immediately adjacent the inclined face liesoutside the tube clear of the neck thereof so that by applying pressurethe contents can be expelled through the tubular member without soilingthe neck, whereas when the tubular mem: ber has been pushed into thetube as far as is permitted by the screw cap without threaded engagementthereof with the neck, the said aperture immediately adjacent theinclined face lies within the tube. i

6. A device according-to claim 5, in which the inlet'opening is providedin the side of said spher-- ical enlargement.

THEODOR RU'ETZ.

